FULL PRODUCT VERSION :
java version "1.6.0_05-ea"
Java(TM) SE Runtime Environment (build 1.6.0_05-ea-b04)
Java HotSpot(TM) Client VM (build 1.6.0_05-ea-b04, mixed mode, sharing)

ADDITIONAL OS VERSION INFORMATION :
Microsoft Windows XP [Version 5.1.2600]

A DESCRIPTION OF THE PROBLEM :
Most other look and feels allow the developer to get the icon used to represent a directory or folder by using the code:

Icon folderIcon = UIManager.getIcon("FileView.directoryIcon");

This works on Metal, and the system look and feels on Windows, Mac, and Linux.

It does not work with Nimbus.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Set the look and feel to Nimbus and render a button with the icon value set to that returned from:
 UIManager.getIcon("FileView.directoryIcon")

e.g.
JButton browseButton = new JButton(UIManager.getIcon("FileView.directoryIcon"));


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The icon used for folders should be returned.
ACTUAL -
return value of null

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package nimbusbug;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;

public class Main {

    public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
iconTest();
}
});
    }

public static void iconTest() {
boolean showBug = true; // change to see the results with System L&F
try {
UIManager.setLookAndFeel(
showBug
? "sun.swing.plaf.nimbus.NimbusLookAndFeel"
: UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
e.printStackTrace();
}
        JFrame frame = new JFrame("Nimbus Issues");
JButton browseButton = new JButton(UIManager.getIcon("FileView.directoryIcon"));
JPanel p = new JPanel();
p.add(new JLabel("This would make a greate 'browse' button:"));
p.add(browseButton);
frame.setContentPane(p);
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}

---------- END SOURCE ----------